>>>>> "Chapman" == Chapman Flack <c...@anastigmatix.net> writes:
>> To clarify, I think my question is functions like json_each or >> json_object_keys() are >> set returning functions ( >> https://www.postgresql.org/docs/9.5/static/functions-srf.html), >> which means it returns a set of results into a Datum. Chapman> Well, it returns one result row as a Datum (either a single Chapman> value or a tuple) each time it is called, until the whole set Chapman> has been returned. The process is described here Unfortunately that describes only one of the two calling protocols for SRFs - the value-per-call mode, which as it happens is NOT the one that json_each uses; that requires materialize mode, which is not actually covered in the docs (but you can find examples in contrib/tablefunc). -- Andrew (irc:RhodiumToad)
